Dust-collector.



PATENTED FEB. 4, 1908.

' w. A. DERBY.

DUST COLLECTOR. APPLICATION FILED FEB. 12. 1907.

V To all whom it may v citizen of the dust collector, showing zontal section in t i r orrron WILLIAM A. DERBY, OF AURORA, ILLINOI S.

DUST-COLLECTOR.

Specification of Letters Patent. Application filed February 12. 1907. herial No. 356.970

Patented Feb. 4., 1908.

concern: Be it known that I, WILLIAM A. DERBY, a United States, residing at Aurora, in the county of Kane and State of Illinois, ha e invented a new and useful Dust-Collec or, of which the'following is a specification.

tem; Fig. 2 is a top plan of the parts shown I in Fig. 1; Fig. 3 is a vertical section through the dust collector pxro er; and Fig. i is a horie ine 44 of Fig. 3.

Referring to the drawings, it will be seen that my dust collector is illustrated in eonnection with certain parts of an air-brake system. The structure is especially adapted for such use and its forms and proportions are especially designed therefor. However, it will be evident that it can be used in other connections, as, for instance, in the. signaling system of a railroad train or in any other kind of an air-pressure systeminwhich it is desired to remove the dirt and dust from the elastic fluid before passing it through arts which might be injured thereby, or beore discharging it into a space where the dust and dirt would produce any undesirable results.

In the drawings, A, indicates the train pipe; B, the triple valve, and C, the auxiliary reservoir of an air-brake system, these parts all' being of standard form and capable of modification to almost any extent without in any way affecting my invention. 1 have therefore not illustrated the detailed connating in from the train pipe sets up a more or less rapid gyratory action within the separating chamber, with the result that the dust and other comparatively heavy particles therein contained, pass through the separating chamber towards its apex and eventually pass out of the whirl of air and fall into the dust-receiving chamber, D. This chamberis materially larger in cross-section than the area of the contracted opening which con-,

nects it with the separating chamber D whereby the imperforate portion of the upper wall of the same forms an outwardly projecting ledge around such opening, an

which covers and. protects the greater portion of such dust-receiving chamber, and thereby prevents the dust collected therein from being drawn upwardly through said opening by the whirling current of air in the separating chamber. The upper wall of the inverted conical separating chamber is centrally perforated for the exit of the air, and the ex aust port, D which is inclosed by a suitable wall threaded for connection with the triple valve, incloses this central perforation so that the air passing from the separating chamber will issue from the port to the triple valve.

- The lower portion of the dust-receiving chamber, D, is tightly closed by a removable plug, D which, when removed, ermits access to the dust-receiving cham er for the purpose of removing any accumulation of dust and dirt there present.

To the upper portion of the Wall of the exhaust port, D, I secure a downwardly-depending rod, E, which extends through the perforation in the upper wall of the separatchamber and extends downward, termia flat, preferably cylindrical, head, E immediately above the opening from the conical separating chamber into the dust ing struction of these parts, nor shall I describe l receiving chamber.

them in detail. Between the triple valve I interpose my dust co the frame of which is cast in one piece a comprises three distinguishable ortions, lower cylindrical dust-receiving c amber, D, an inverted conical separating chamber, D and an outlet port, D The separating chamber, D is provided at one side with a tangentially-entering integral intake port,

D threaded to receive connections from the 0 I I a a the train pi e and lector, d

- In the use of the air-brake system, violent air currents are often set up in the dust collector and these currents are frequently of such force as to set the air in the dust-receiving chamber, D, into violent movement, with the result that if no means are provided to prevent such an occurrence, the dust already deposited will be gathered up by the air in its violent movement and carried on into the triple valve with very bad results. Whpn verted conical chamber at the upper portion vice, however, the dust rising from the dustamber l receiving chamber,

E and its motion will be arrested thereby, so as to prevent such action. The method of supporting this head 1s particularly advantageous in that the head 1s entirely out of contact or connection with the side walls of the separating chamber; and as a result there are no projections upon said side walls tending to arrest the passage of the dust downward toward the' dust-receiving chamber. Furthermore, any moisture which may be condensed by'athe'release ofpressure in the system or by the entrance of the air into the dust collector in cold weather, will pass freely downward into the dust-receiving chamber, so' that no undesirable accumulations can occur in the separating chamber, which is comparatively inaccessible for cleaning purposes and from which any accumulations are kely to be carried into the triple valve.

I realize that considerable variation is possible in the details of construction without departing from the spirit of my invention, and I do not therefore intend to limit myself-to the specific form herein shown and described.

I claim as new and desire to secure by Letters Patent 1. In a dust collector, a casing provided with an upper separating chamber and a lower'collecting chamber said lower collecting chamber having its upper wall provided with an outwardly projecting ledge surrounding suchcpeningmitha contracted freeopening between them, the separating chamber belng provided with a central opening in its upper wall, a wall above the upper wall of close 'an exhaust port, an air inlet port ex'-' tending tangentia y from the upper part of chamber and su port, and a guar ing chambers.

with an upper separating chain er and'a being provided with-a central opening in :its

close an exhaust tending tangential y from the upper part of the separating chamber, a stem extending through the upperopeningrin the collecting chamber and sup orted by the wall of the port, and a guar cad-attached at its-center opening between the separating and collecting chambers and above the-level of said opening. 7 y l a WILLIAM A. DERBY.

In presence of J. H. LANDES,

, v R. A. SoHaEFER.

the se arating chamber, a stem extending-1. 1 throug the upper opening in the collecting? ported by the wall of the ead attached at its center the lower end of said stem in line with the-g5 opening between the separating-and collectv j.'

lower collecting chamber said lower-collect ing chamber having its upper Wall provided? with an outwardly projectlng ledge surround ing such opening, wl th a'contracted free open- 1 ing between them, the. separating chamber;

the lower end of said stem in line with the the separating chamber and inclosing said]- perforation, said wall being formedto-m- 2. In a dust collector, acasm provided; 

